Hello,
I am trying to run a simulation where I impose a displacement in a cantilever beam. In this case, there is no imposition of tractions. There will be stresses as reactions to the imposed displacement, but FreeCAD is not allowing this case.
This is the error that I get
OS: Windows 8.1
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.16.6706 (Git)
Build type: Release
Branch: releases/FreeCAD-0-16
Hash: f86a4e411ff7848dea98d7242f43b7774bee8fa0
Python version: 2.7.8
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 6.8.0.oce-0.17
Enforced pressure-constraint in static analysis
Moderator: bernd
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and Helpful information for the FEM forum
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Re: Enforced pressure-constraint in static analysis
For using FEM module download 0.17 dev version, e.g.
from https://github.com/FreeCAD/FreeCAD/releases
Prerequisities are fixed there and you will find a lot of new features.
Code: Select all
FreeCAD_0.17.10634_x64_dev_win.7z
Prerequisities are fixed there and you will find a lot of new features.
Re: Enforced pressure-constraint in static analysis
It works, as you mentioned. Thanks.
The post-processing is not clear though.
The post-processing is not clear though.
Re: Enforced pressure-constraint in static analysis
Attached you can find a small example.
Left face is fixed, right face gets a displacement of 10 mm. if you are interested in reaction forces caused by this deflection, you have to edit ccx-input-file (here Fillet_mesh.inp)
before ccx's execution
Please insert reddish output request by hand
Left face is fixed, right face gets a displacement of 10 mm. if you are interested in reaction forces caused by this deflection, you have to edit ccx-input-file (here Fillet_mesh.inp)
before ccx's execution
Please insert reddish output request by hand
In ccx-output-file (Fillet_mesh.dat) you can find that 42000 N needs to be loaded***********************************************************
** Outputs --> frd file
** written by write_outputs_types function
*NODE FILE
U
*EL FILE
S, E
** outputs --> dat file
*NODE PRINT , NSET=Nall
U
*NODE PRINT , NSET=FemConstraintFixed, TOTALS=ONLY
RF
*EL PRINT , ELSET=Eall
S
***********************************************************
Let us know if you are looking for something elsetotal force (fx,fy,fz) for set FEMCONSTRAINTFIXED and time 0.1000000E+01
-4.230049E+04 2.246115E-07 5.220707E-08
Re: Enforced pressure-constraint in static analysis
an file updated be the original author can be found here: https://forum.freecadweb.org/viewtopic. ... 49#p312618